V3 and SP textures can be used on Aiko. You may have to apply them to her legs by hand, though, because her leg material zones are different.

The full version of Aiko comes with an Aiko-to-SP figure, which is basically Aiko's head on SP's body. That figure can wear SP's clothing.

Aiko LE - the free version you can DL at DAZ - does not come with the Aiko-to-SP figure. Not sure if the 3DWorld version of Aiko is the full version, or Aiko LE.